cookie实现登陆页面保存用户名

来源：互联网发布：手机4g网络测速在线编辑：程序博客网时间：2024/05/21 04:21

密码也可以保存，但我没实现出来

1.首先是用户名，密码的input 和保存状态的checkbox

<input class="ipt" type="text" name='username' value='${name}'/><input class="ipt" type='password' name='password' id='password' /><input style=" margin-left:60px; margin-right:10px; " type="checkbox" name="rememberMe" id="rememberMe" />

没找到怎么保存checkbox的状态，我就自己写了个

<script>window.onload = function() {if ('${name}' != '') {document.getElementById('rememberMe').checked = true;} else {document.getElementById('rememberMe').checked = false;}}</script>

2.然后在jsp顶部加入java代码，用于读取cookie

<%String name = "";String psw = "";String checked = "";Cookie[] cookies = request.getCookies();if(cookies != null && cookies.length>0){for(int i =0; i<cookies.length; i++){if(cookies[i].getName().equals("name")){name=cookies[i].getValue();request.setAttribute("name",name);}if(cookies[i].getName().equals("psw")){psw=cookies[i].getValue();request.setAttribute("psw",psw);}}}%>

3.其次，在登陆到后台验证完毕密码后面加入

//处理CookieaddCookie(username , pwd ,response ,request);

下面是addCookie这个方法

/**Cookie的实现 * @throws UnsupportedEncodingException **/private void addCookie(String name, String password,HttpServletResponse response, HttpServletRequest request) throws UnsupportedEncodingException  {if(StringUtils.isNotBlank(name)&&StringUtils.isNotBlank(password)){//创建Cookie//Cookie nameCookie=new Cookie("name",URLEncoder.encode(name,"utf-8"));Cookie nameCookie=new Cookie("name",name);Cookie pswCookie=new Cookie("psw",password);//设置Cookie的父路径nameCookie.setPath(request.getContextPath()+"/");pswCookie.setPath(request.getContextPath()+"/");//获取是否保存CookieString rememberMe=request.getParameter("rememberMe");if(rememberMe==null){//不保存CookienameCookie.setMaxAge(0);pswCookie.setMaxAge(0);}else{//保存Cookie的时间长度，单位为秒nameCookie.setMaxAge(7*24*60*60);pswCookie.setMaxAge(7*24*60*60);}//加入Cookie到响应头response.addCookie(nameCookie);response.addCookie(pswCookie);}}}

参照了：http://www.2cto.com/kf/201405/302677.html 和http://blog.sina.com.cn/s/blog_6d187d2701019ayb.html

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